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4=2-n
We move all terms to the left:
4-(2-n)=0
We add all the numbers together, and all the variables
-(-1n+2)+4=0
We get rid of parentheses
1n-2+4=0
We add all the numbers together, and all the variables
n+2=0
We move all terms containing n to the left, all other terms to the right
n=-2
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